Question

a)5x-x+10=140
d)x+x+x=120
e)5x=x+200
g)8x+9x=170
qual a resposta?<3

Answer 1

a) 5x-x+10=140
4x=140-10
4x=130
x=130/4
x=32,5

d) x+x+x=120
3x=120
x=120/3
x=40

e) 5x=x+200
5x-x=200
4x=200
x=200/4
x=50

g) 8x+9x=170
17x=170
x=170/17
x=17